Drilling-machine.



No. 659,636. Patented Oct. I6, |900.,

B. F. BARNES.

DRILLING MACHINE.

(Application fled May 24, 1900.

(No Model.) 2 Sheets-Sheet l.

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Patented out. is, |900.

'2 Sheets-Sheet 2.

B. F. BARNES.

' DRILLING MACHINE.'

(Application led May 24, 1800.)

(No Model.)

Nrrnn ATENT OFFICE.

BENJAMIN F. BARNES, OF ROCKFORD, ILLINOIS, ASSIGNOR T THE B. F. BARNES COMPANY, OF SAME PLACE.

DRlLLlNG-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 659,636, dated October 16, 1900.

Application filed May 24, 1900.

T0 @ZZ w/tom it may con/cern:

Be it known that I, BENJAMIN F. BARNES, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a specification.

This invention consists of a drilling-machine, to Which is applied a self-feeding attachment for the drill, and in the various details of construction shown in the accompanying drawings, in Whichf Figure 1 is a perspective view of a drillingmachine embodying my improvements. Fig. 2 is an isometrical representation of the selffeeding attachment. Fig. 3 is a vertical section through the lever for moving the selffeeding attachment. Fig. 4 is a vertical section of the upper portion of the frame. Fig. 5 is a vertical section of the center portion of the frame. Fig. 6 is an isometrical representation of the roller. Fig. 7 is a plan view of the upper Worm and Worm-Wheel connection of the self-feeding attachment. Fig. 8 is an isometrical representation of the fork forining a connection between the lever and the Worm. Fig. 9 is a face representation of a portion of the main frame, showing the point of attachment of the raising-screw for a table.

The frame of the drill consists of the column 1, heads 2, supported by the arm 3 and vertical portion 4, bearings 5, supported by the brace-arms 6 and 7, and a diagonal brace 8.` The column l supports a work-receiving table, and the connection is formed by the rest for the table, composed of two portions 9 and 10, joined to an arm 11, Which supports the table 12 in the usual manner. The upper portion 9 has a vertical opening 13 at its rear face, and a screw 14 clamps it around the column. The lower portion has an upwardlyextending iiange 15 and an outwardly-extending rib 16. A shoe 17 has a grooved inner face receiving the outwardly-extending rib 16 and has a vertical screw-threaded section 18. A screw-threaded shaft 19 is supported in the base of the drill in the usual manner, its upper portion guided in a support 20, secured to the column by two bolts 2l. The column has a horizontal slot 22 and Serial No. 17,857, (No model.)

a center enlargement 23. The heads of the bolts 21 are passed-through the enlargement 23 intp the ends of the horizontal slot before they are passed through the support, thereby saving drilling and tapping the column, the opening being bored out. The outwardlyextending rib 16 is of sufficient extent to pel'- mit the turning of the table to properly present the Work to the drill, and the opening 24 at the junction of the branches permits the end of the shoe to pass through it, so that the table can be turned farther around. A drillspindle 25 is supported in the heads 2 and has a gear connection with the horizontal driving-shaft 27, supported in the bearings 5. The shaft supports cone-pulleys 28 and 29. A transverse shaft 26 is supported by the frame of the drill, and upon one end is connected a quick-return lever 30 and to its other end is secured a Worm-wheel 31, and upon the shaft is mounted a hand-lever 33, supporting a Worm 34, which has a connection with the thumb-lever 35, so that by the thumb-lever the Worm can be disengaged from the Worm-Wheel 31. A hand-Wheel 36 has a connection with the Worm in order that the worm-wheel may be rotated by rotating the hand-wheel, and the worm 34 acts as a dog When the hand-lever 33 is moved, and this worm must be held out of engagement by means of the thumb-lever when the quick return is used. From the diagonal brace-bar 8 extends an arm 37, to the free end of which is connected an arm 38, having an upturned end 39, Which enters a notch 40 in the handlever 33 and holds it in a vertical position. This arm is sufficiently yielding toallow its free end to spring into the notch.

Upon the arm 37, inside of the arm 38, is pivotally supported a frame consisting of the portion 41, horizontal portion 42, supportingboxes 43, and a vertical portion 44, supporting boxes 45. A shaft 46 is supported in the boxes 43, one end havinga Worm 47 connected thereto, and to its other end is secured a conepulley 48. A belt 49 connects the ,cone-pulleys 28 and 48. A vertical shaft 50 is supported by the boxes 45, its upper end supporting a Worm-Wheel 51, which meshes With the Worm 47, and its lower end supporting a Worm- 52, adapted to mesh With the Worm- IOO wheel 31. From the end of the lower box 45 extends an arm 53, from which extends a projection 54.

Upon the transverse shaft 26 is loosely mounted alever 32, having acam-slot 55, receiving the projection 54, alsoa cam-surface 56. Between the lever 32 and the hand-lever 33 is located a yoke 57, which embraces the shaft 26, and from its upper end extends a stud 58, which enters an opening in the support for the worm 34, and near its center portion extends a stud 59, which is located in the path of the cam-surface 56.

When the self-feeding attachment is in the position shown at Figs. 1 and 3, the worm 34 of the hand-lever is in engagement with the worm-wheel 31, and the drill-spindle can be raised and lowered by means of the hand-le ver 33 or handwheel 36, and the lever 32 will be in position to hold the swinging fr'ame, so that the worm 52 will be free of the Wolmwheel 31 and the belt`49, connecting the conepulleys 28 and 4S, will be slack, thereby allowing the mechanism of the self-feeding attachment to remain at rest while the drill is fed by hand. When the self-feed is wanted, the lever 32 is moved forward into the position shown at Fig. 2. Such movement will cause the cam-surface 56 to engage the stud 59 and through the yoke 5l will raise the worm 34 out of engagement with the wormwheel 31, and when this .disengagement has taken place a further movement of the lever will cause the cam-slot 55 to draw on the stud 54, which will move the swinging frame upon its pivotal connection and cause the worm to engage the worm-wheel 31 and at the same time tighten the belt 49 sufficiently to drive the mechanism and impart a rotary movement to theshaft 26. Upon returning the lever 32 to the position shown at Fig. 1 the worm 52 will be disengaged from the wormwheel 31, the belt slackened, and the worm 34 moved into engagement with the wormwheel 31, so that the drill can be operated by hand.

In the upper end of the drill-frame is found an opening 61, having side guideways 60, and a roller 62, having trunnions 63, is adapted to enter the opening and be supported by the guideways.

An opening 64 is formed in the face of the column 1, having side guideways 65, which receive a roller like that shown at Fig. 6. These rollers are calculated to guide the chain 66 supporting a counterbalance-Weight to the drill-spindle, and these guideways are a part of the drill-frame and the rollers are placed in position. The drill-spindle 66 has the usual rack-and-pinion connection with the transverse shaft 26.

I claim as my invention- 1. In a drilling-machine, the combination of a drill-spindle, a movable frame, two shafts supported by the frame having a driving connection, a belt connecting one of the shafts and the driving power of the drill and the other shaft adapted to have a'connection with the drill-spindle.

2. In a drilling-machine, the combination of a drillspindle, a shaft having a connection with the spindle, a worm-wheel connected with the shaft, a hand-lever supporting a worm, the worm adapted to engage the wormwheel, a movable frame supporting two shafts having a driving connection, one shaft hav- Ying a belt connection with the driving power of the drill, the othershaftsupportingaworm, and means for moving the frame and moving the worm of the hand -lever, whereby the worms are movable into and out of engagement with the worm-wheel.

`3. In a drilling-machine, the combination of a drill-spindle', a shaft having a connection with the spindle, a worm-wheel connected with the shaft, a hand-lever supported by the shaft and su pporting a Worm, a worm having a driving connection with the driving power of the drill, a lever having a connection with both worms whereby as one worm is thrown out of engagement with the worm-wheel the other is allowed to come into engagement therewith.

4. In a drilling-machine, the combination of a drill-spindle, a shaft having a connection with the spindle, a worm-wheel connected with the shaft, a hand-lever supported by the shaft and supportinga worm, a worm having a driving connection with the driving power of the drill, a lever having a connection with the worm connected to the driving power of the drill and ayoke connecting the lever with the worm supported by the hand-lever.

5. In a drilling machine, a main frame formed with bearings for a drill-spindle and driving-shaft, an opening formed adjacent to the bearings and having guideways, and a roller having trunnions adapted to be guided and supported by the guideways.

6. In a drilling-machine, the combination of a column, a table-supporting bracket supported by the column, a screw having an engagement with the bracket for raising and lowering the table, the upper end of the screw supported by a bracket connected to the co1- umn, the connection consisting of an elongated opening having a central enlargement formed in the column, and two bolts located in the ends of the openings and passing through the bracket-receiving nuts on their outer ends.

7. In a drilling machine, a main frame formed with bearings for a drill-spindle and driving-shaft, a column provided with an opening having gnideways, and a roller having trunnions adapted to be guided and supported by the guideways.

8. In a dri1lingmachine, a main frame formed with bearings for the drill-spindle and driving-shaft, an opening formed adjacent to the bearings having guideways, a column provided with an opening having guideways, a roller for each opening supported bythe guideways, a chain passing over the rollers having IOO IIO

one end connected to the drill-spindle and its other end connected to a, Weight.

9. In a drilling-machine, a column, a tablesupport surrounding the column Consisting of two branches, one branch having a Verti- Cal slit, a clamp foi1 this branch, a concentric sleeve on the other branch, a, projection on the sleeve, a shoe receiving the same and a screw-shaft supporting the shoe.

BENJAMIN F. BARNES.

Witnesses:

A. O. BEHEL, E. BEHEL. 

